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Electrical issue

  

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I have a Ford 1992 F150 XLT, 351 5.8 V8 automatic 169071 miles, whenever I hit the fuse box or some force is occurring on the body of the truck the engine will rev up on it’s on to a higher RPM, then when ever you’re at a stop and you don’t give it gas it will stall, and it stalls a lot it will drop to a lower RPM and then stall, then if you don’t touch or put the fuse box to a certain location the entire truck will lose power 


1 Answer
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For the stalling, check for vacuum leak, clean the IAC valve, MAF sensor, and the throttle body.

For the fuse issue, you may have loose connection. Check the fuse box and make sure all the connections are tight. 


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